Watch.



E. S. PERRY.

WATCH.

APPLICATION I'ILBD AUG. 21, 1910.

1,013,896, Patented Jan. 9, 1912.

FIG; 1

Illh 2526 6' 6 11 Z mmgk 17a 2 V 6 mun I F':-\ D Q) A ZZI'kJQWZ EZI Z;

%M 4 ATTORNEY UNITED STATES PATENT OFFICE.

EARLE SLOAN PERRY, OF WALTHAM, MASSACHUSETTS, ASSIGNOR TO KEYSTONE WATCHCASE COMPANY, A CORPORATION OF PENNSYLVANIA.

WATCH.

Specification of Letters Patent.

Patented Jan. 9, 1912.

Application filed August 27, 1910. Serial No. 579,210.

To all whom it may concern:

Be it known that I, EARLE SLOAN PERRY, a citizen of the United States,and a resident of lValtham, in the county of Middlesex and State ofMassachusetts, have invented cer' tain new and useful Improvements in\Vatches, whereof the following is a specification, reference being hadto the accompanying drawings.

This invention relates to the stem winding and setting mechanism, andparticularly to the parts cooperative to hold the clutch in itsrespective positions.

The principal objects of this invention are to provide the winding andsetting mechanism of a watch movement with simple and efficient shiftingand locking means, which may be readily assembled, and which isincapable of accidental displacement when locked in either the windingor setting positions, and whose adjustment is limited by meansindependent of the watch-case; to provide a locking lever with asubstantially semi-circular cam, fitted into a spring detent having arecess substantially conforming to the contour of said cam; andcooperative therewith to shift said mechanism, and to retain said leverto lock said mechanism in the winding position, and to prevent theopposite end of said lever engaging the winding gear, and to providesaid cam with means cooperative with said detent, to limit its movementwhen shifted to the setting position of said mechanism, and to preventsaid lever engaging the movement casing.

Briefly stated, the form of this invention hereinafter described,provides a watch-case with a longitudinally movable stem, having asquared portion provided with a clutch operatively engageable witheither the winding mechanism, or the setting mechanism; a springoperative to normally maintain said clutch in engagement with thewinding mechanism; a lever pivoted intermediate of its ends, and havingone end engaged with said stem, and its opposite end provided with anotched cam; a spring detent providing a recess operative to engage saidcam, and to require a substantial pull upon said stem to dislodge saidcam from said recess, and providing a projection operative to engagesaid notch when thus dislodged.

This invention further includes all of the various novel features ofconstruction and arrangement hereinafter more definitely specified.

In the accompanying drawings, Figure 1 is a fragmentary face view of awatch movement embodying a convenient form of this invention, andshowing the parts in the winding position, and Fig. 2 is a fragmentaryface view of said watch movement showing the parts in the settingposition.

In said figures, 5 represents the watch-case in which is secured themovement comprising in part the dial plate 5 said watchcase beingprovided with the stem 6 which has a squared region 7, and which ismounted for rotation, and arranged to be shifted longitudinally. Saidstem 6 has the winding gear 8 loosely mounted thereon, and is providedwit-h the clutch comprising the crown ratchet 9 having ratchet teeth 10arranged to engage with ratchet teeth 11 on the winding gear 8, and acrown gear 12 having teeth 13 arranged to mesh with the pinion 14, whichis meshed with the hand setting wheel 15. Said clutch is provided withthe peripheral groove 18 arranged to receive the free end of the springmember 19 which is secured to said dial plate 5 by the screw 20 andwhich is arranged to normally maintain said clutch in such position thatthe teeth 10 of the crown ratchet 9 engage with the teeth 11 of thewinding gear 8.

The stem 6 is provided with a groove 22 with which the inturned end 25of the lever 26 is engaged. Said lever 26 is pivoted at 27 to the dialplate and is provided with the cam 28 normally fitted in the recess 29of the spring detent 30, which is also secured to the dial plate by thescrew 32, and which has its outer free end in slidable engagement withthe spring 19. The cam 28 is provided with the notch 34, arranged toengage the projection 35 at the outer edge of the recess 29, when thestem 6 is shifted outwardly to withdraw the cam 28 from the recess 29,which operation effects the shifting of the detent 30, to a positionwherein the teeth 13 of the crown wheel 12 engage the teeth of thepinion 14.

It will be obvious from Fig. 2 of the drawing that the outward movementof the stem 6 effects a rocking of the cam lever 26 upon its pivot 27 towithdraw its cam 28 from the cam recess 29, and thereby press the springdetent 30 from its normal position, against the spring 19 to shift theclutch comprising the crown wheels 9 and 12, to the position shown insaid figure wherein the teeth 13 of the crown wheel 12 engage with theteeth of the pinion 14, whereby any rotation of the stem 6 effects amovement of the setting wiheels independent of any movement of thewinding mechanism which is operated by the winding gear 8. Furthermoreit will be obvious that when the cam 28 is seated in the recess 29 asshown in Fig. 1 of the drawings it will require considerable effort toshift the stem 6 from the winding position. Again, it will be understoodthat by reason of the construction and arrangement of the several parts,all danger of accidentally shifting the mechanism from the winding tothe setting position is avoided, as is also any danger of forcing thewinding stem 6, when the parts are in the winding position, inwardly, tosuch an extent as to engage the clutch with the pinion 14:, for thereason that when the parts are in the winding position, any strainimposed upon the winding stem tending to force the same inwardly tobring the clutch into engagement with the setting mechanism will beimposed upon the pivots 27 and 32, tending to separate or dislodge them,which, of course, is impossible. In other words, any inward movement ofthe long arm of the pendant lever 26 would tend to cause an outwardmovement of the short arm thereof, and the cam surface of the extremeend thereof fitting closely or nicely into the recess 29 of thespring-detent 30, would be forced to move in a direct line against thescrew 32 of said spring-detent 30, which movement, of course, would beprevented by the wall of the recess 29. The advantage of thisconstruction will be recognized when it is remembered that in themajority of instances watch movements are tested and adjusted in thefactory prior to being cased. In the operation. of testing andadjusting, it is the custom to insert into the movement the winding stemhaving the crown thereon, in order that, after proper inspection, thehands of the watch movement may be properly set to a correct reading,and also for the purpose of winding the movement at proper intervals. Inthe many forms of winding and setting mechanism, it frequently happensthat in winding the movement before being cased, a slight push on thewinding stem will cause the clutch to engage with the setting wheels,and thereby disturb the proper adjustment of the hands. In my improvedmechanism, this danger is avoided, in that by reason of the cam on thependant lever fitting nicely in a corresponding recess in thespring-detent 30, looks the winding stem when in its winding positionagainst any inward movement beyond a pre-determined point, that is, toan extent where the clutch might come into engagement with the settingwheels. Again, by reason of the formation of the notch 24 in the cam 28,and its engagement with the extension 35, the extent of engagement ofthe teeth 13 on the crown ratchet 12 with the teeth on the pinion 14, ispredetermined. When the winding stem 6 is pulled outwardly to efi'ect asetting adjust ment of the parts, the cam on the lever 28 will cause aninward movement of the free end of the spring-detent 30 until the notch24: snaps over and rests upon the extension 35, which, as before stated,retains the teeth 13 of the crown ratchet 12 in proper engagement withthe teeth on the pinion 14. Any further pull on the winding stem 6 willcause an interlocking or jamming of such teeth, this further pull,however, being resisted by the engagement of the notch with the saidextension, and by reason of the change in'the outline of the cam surfaceat that point wherein the notch is formed. Should, however, this occur,that is, should the teeth 13 too tightly engage the teeth on the pinion14, when the pull on the stem 6 is released, the tension of the springs19 and 30 immediately causes a separation of the teeth until the notch24: engages with the extension 35, in which respective positions theparts will be held or retained, and in which position the teeth abovereferred to will be in proper free working engagement.

Having thus described this invention, I claim:-

In a winding and setting mechanism, the combination with a rotatablewinding stem capable of longitudinal movement, of a clutch mounted onsaid stem and rotating therewith, a pendant lever engaging at one endwith said stem and provided at the other end with a substantiallysemi-circular notched cam, a spring-detent, the free end of which isprovided with a recess conforming in outline to that of said cam, andnicely containing the latter when in the winding adjustment, and aspring, the free end of which engages said clutch for shifting thelatter in accordance with the longitudinal movement of the winding stem,the notch in said cam engaging with the wall of the recess formed insaid spring-detent when the parts are in the setting position,substantially as described.

In testimony whereof, I have hereunto set my hand this 24th day ofAugust, A. D.

EARLE SLOAN PERRY. Witnesses:

W. C. COOK, W. B. MEHL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

